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Thanks for that Old&Cold. Seems it only applies to vertical panel rads and now I know what to call it I can find more info on the web. I was definitely in the "what the ……………" category.

This was a change about ten years ago when I redecorated. A single purchase off the internet and I've lost all record of where it came from. It has vertical panels see photo. Another clue!

It isn't a transit blank, it was packed separately with fitting instructions, which I must have thrown away. At the time I fitted it, a long time ago, I asked a plumber about it. He didn't know what it was either. When I posted the question I didn't give my own opinion because I didn't want to...

Hi Have a look at the attached photos please and tell me what it is and why I need to put it in my radiator. The rad is only small, 300w x 500h and this part was loose inside the rad behind the valve. It is solid, the hole shown in one of the pictures doesn't go right through and it fitted...

Thanks for that. Seems I've been thinking about it for too long!

I want to drain my CH system down to see if it is clear, as I had trouble with a couple of rads not heating up during the winter. The only drain point is on the hall radiator. If I drain from here the system will only be drained to the bottom of the down stair rads. If I then open the valve at...

I had balanced it best as I could. That is turning the first rad down to a crack and then opening each one up a bit more in turn but I still had the problem with the last two. I don't want to mess about with things at this time of year as most of the house is still OK heat wise. I think I'll...

Thank you all for your input. For a bit more clarification if all the rads are open the ones nearer to the boiler heat up quickly to their full temperature. It's just the last two which never get more than luke warm.

I have a Vaillant ECO max 800 (approx. 17 years old) running 8 rads in a medium sized semi. Recently the last two rads on the circuit haven't been heating up fully. They don't need bleeding and I don't think the system can be furred up, because one of the rads is only a year old and there was no...

Thanks for that everybody. Looks like I might get a new pan, negotiations in progress.

I had a new bathroom fitted out recently and the tiler put left over plaster down the WC pan. It stuck to the bottom of the pan u bend and while I've been able to scrape it off the surface stil feels rough. I'm afraid it will not clean properly now. Is the only solution a new WC pan or can the...

I'm still considering my options here. I'm not 100% sure about how a Diverter valve works but if I'm getting domestic hot water and heating when required. Which I am. How can the Diverter valve be faulty?

I don't have the pre heat on bobw1956. I could never see the advantage unless you were drawing hot water off constantly. Thank you Thebunny831 I'll look into that. Might have to just change it and see. The boiler is quite old now.

I have a Vaillant ECO max 828 E boiler. Everything works fine but the only way to control the central heating is via the thermostat. If I leave it to operate on the Time Switch it turns itself back on on at some point even though the Timer is telling it heat is not required. I've...

The boiler is in our bedroom wardrobe so I can't see it getting too cold. It is of course on an external wall in an old house but I've had insulation blown into the cavity so it shouldn't get that cold. That of course is only relevant to what the frost thermostat is set to. I don't know...

I have a Vaillant ECOmax 828. Recently it has been firing up during the night despite the timer being off and now it doesn't want to shut down on the timer. It just keeps trying to start up again, fails to start and keeps trying again. I've now left it on permanently and control it from...